From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752253AbdBFSuA (ORCPT ); Mon, 6 Feb 2017 13:50:00 -0500 Received: from pandora.armlinux.org.uk ([78.32.30.218]:48292 "EHLO pandora.armlinux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751913AbdBFSt5 (ORCPT ); Mon, 6 Feb 2017 13:49:57 -0500 Date: Mon, 6 Feb 2017 18:49:42 +0000 From: Russell King - ARM Linux To: Will Deacon Cc: Brian Starkey , Eric Dumazet , Thomas Gleixner , LKML , Peter Zijlstra , Ingo Molnar , Andrew Morton , Alexander Potapenko , Steven Rostedt , Sebastian Andrzej Siewior Subject: Re: Regression: Failed boots bisected to 4cd13c21b207 "softirq: Let ksoftirqd do its job" Message-ID: <20170206184942.GM27312@n2100.armlinux.org.uk> References: <20161117164200.GA24653@e106950-lin.cambridge.arm.com> <20161122103351.GA25080@e106950-lin.cambridge.arm.com> <20161122152733.GH25080@e106950-lin.cambridge.arm.com> <20161123182115.GA28733@e106950-lin.cambridge.arm.com> <20161125131403.GA2813@e106950-lin.cambridge.arm.com> <20170206184619.GB20777@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170206184619.GB20777@arm.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 06, 2017 at 06:46:19PM +0000, Will Deacon wrote: > Converting the smc91x driver over to NAPI would probably solve this problem, > but given the "vintage" of this code, I'd be more tempted by a simpler > point fix if only I could think of one. I'm not sure if converting it to NAPI would solve it, or just move the problem elsewhere - IOW, move it from "we need to drop the packet because we couldn't allocate a skb" to "the hardware dropped the packed because the FIFO was full." Yes, I'm intending giving it a go, once I've a spare moment to build a kernel for the platform etc. It runs root NFS, so should be a good test for it. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net.